[PHSL 3051] - Final Exam Guide - Everything you need to know! (33 pages long)

• School: UMN
• Department: Physiology
• Course: PHSL 3051
• Professor: Carney- Anderson Lisa

Document Summary

Learning objectives for dr. barnett"s lectures & lab. Wed. , feb. 11 - lecture 10: skeletal muscle: muscle structure -- excitation-contraction coupling (see ct 4. 1: draw and label a diagram that shows skeletal muscle at all anatomical levels. Illustrate the structural characteristics of whole muscle (intact muscles attached to the skeleton), single muscle cells, myofibrils and sarcomeres. , at the sarcomere level your drawing should identify the molecular components that are the basis of its striated appearance. Two stages of myofilament overlap: muscle relaxed stage h zone occupies a little more than 50% of the. A band; i bands are similar in size to the a band; sarcomere is relatively long. Muscle contracted stage sarcomere is shorter; h zone occupies a small fraction of the a band; i band is significantly smaller than the a band; a band remains constant. Neuromuscular junction postsynaptic proteins: ach gated channels that allow na influx and k efflux (stronger na influx btw).